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Kernel: HiSilicon and AMD Energy Monitoring Driver

Submitted by Roy Schestowitz on Wednesday 21st of April 2021 08:53:00 PM Filed under
Linux
  • CPU Cluster Scheduler Continues To Be Worked On For Linux With Promising Results

    HiSilicon engineers continue working on a cluster scheduler that could help the performance of certain x86 and ARM platforms on Linux.

    HiSilicon has been pursuing this "cluster scheduler" for the Linux kernel in order to enhance the performance of the Kunpeng 920 ARM server chip that has six or eight clusters per NUMA node and each cluster being comprised of four CPU cores with shared L3 cache access among the clusters. But there is also the possibility of this scheduler helping some x86 hardware too, like Intel's Jacobsville is noted for its clusters of Atom cores.

    The HiSilicon Linux kernel work now up to its sixth round of patches is for exposing this topology and having a CPU scheduler to properly/efficiently deal with the layout. The goal with the scheduler is for spreading unrelated tasks among the multiple clusters to reduce contention and then to also gather related tasks within a cluster for improving cache affinity.

  • AMD Energy Monitoring Driver Slated To Be Removed From The Linux Kernel - Phoronix

    As a surprise and big disappointment, the "amd_energy" driver that exposes AMD EPYC server CPU energy monitoring metrics under Linux for being able to calculate the per-core and package power consumption and more is now set to be removed from the mainline Linux kernel.

    The removal of this driver sadly isn't for a case like it's being replaced by some superior solution but rather a disagreement in the exposing of the energy data.

    Last year as a result of the PLATYPUS power attack Linux restricted access to such data to root/privileged users.

»

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